Electrical resistivity (volume resistivity) is a measure of how strong the
material opposes the flow of electric current. It's the inverse of electrical
conductivity.
Electric resistivity is calculated with the formula below :
Resistivity = R (Electrical resistance of material) * A (Cross sectional area)
/ L (Length of the material)
SI unit of electrical resistivity is ohm meter (metre). Other common units are
ohm inch, microohm inch, ohm centimeter.